XX DB 0AH, 0DH, "Please enter the string: $"

BVF DB 30

DB？

DB 30 DUP(？ )

ed

SSEG segment stack

STK DB 100 DUP(？ )

End of SSEG

code segment

Suppose CS: code, DS: data, SS:SSEG.

Start:

MOV axe, data

MOV DS，AX

LEA DX，XX

MOV, 9

INT 2 1H

LEA DX of BVF

MOV, 0AH

INT 2 1H

Bvmov city+1

And CX, 0FH

CX MOV·BX

Add BX,1; Determine the value of BX and find the offset position of the last element.

Mark: MOV, 2

MOV DL，BVF[BX]； There must be one of bx, si and di registers in parentheses.

INT 2 1H

BX December; The pointer moves forward.

Loop marking

MOV, 1

INT 2 1H； Pause and look at the output characters. If not, it will flash by.

MOV, 4CH

INT 2 1H

End of code

End start